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in order to correct double-vision, prisms must be opposite bases for each eye. If the prism in one eye is Base down, then the other must be Base up. In CLs, the prism is 'prism ballast' . This is used on toric lenses to try and maintain the cyl correction at the required angle.

in order to correct double-vision, prisms must be opposite bases for each eye. If the prism in one eye is Base down, then the other must be Base up. In CLs, the prism is 'prism ballast' . This is used on toric lenses to try and maintain the cyl correction at the required angle.

For for those of us with double vision (and I'm thankful I'm not one of them) contact lenses are just not an option then, right?

Intelihealth.com says Treating double vision depends on its cause. For example, people with astigmatism that causes double vision can wear special contact lenses. Sometimes, simply updating your prescription eyeglasses takes care of the problem. Surgery is used to treat cataracts and pterygium, and surgery on the eye muscles can treat certain types of double vision. Often, adjustable stitches are used so that the position of the eyes can be fine-tuned a few hours after the surgery. That way, the patient is alert for the adjustment and can report whether the double vision is gone. Prisms also may be used in the glasses to fine-tune the surgery by moving the image seen with one eye to coincide with the other eye.

Intelihealth.com says Treating double vision depends on its cause. For example, people with astigmatism that causes double vision can wear special contact lenses. Sometimes, simply updating your prescription eyeglasses takes care of the problem. Surgery is used to treat cataracts and pterygium, and surgery on the eye muscles can treat certain types of double vision. Often, adjustable stitches are used so that the position of the eyes can be fine-tuned a few hours after the surgery. That way, the patient is alert for the adjustment and can report whether the double vision is gone. Prisms also may be used in the glasses to fine-tune the surgery by moving the image seen with one eye to coincide with the other eye.

I guess special contact lenses are an option for people with double vision, depending on what type of double vision is involved, right?

Any materials provided on this web site are for informational purposes only. Have your eyes examined regularly and always follow your eye care professional's instructions for the proper use and care of your contact lenses. IF YOU ARE HAVING ANY UNEXPLAINED EYE DISCOMFORT, WATERING, VISION CHANGE OR REDNESS, REMOVE YOUR LENSES IMMEDIATELY AND CONSULT YOUR EYE CARE PROFESSIONAL BEFORE WEARING YOUR CONTACT LENSES AGAIN.